libjack: copy output to all setup audio ports for single out clients

source/libjack/libjack.cpp

@@ -719,6 +719,16 @@ bool CarlaJackAppClient::handleRtData()
                                     FloatVectorOperations::add(fdataRealOuts, fdataCopyOuts,
                                                                fServer.bufferSize*fServer.numAudioOuts);
                                 }
+
+                                if (jclient->audioOuts.count() == 1 && fServer.numAudioOuts > 1)
+                                {
+                                    for (uint8_t i=1; i<fServer.numAudioOuts; ++i)
+                                    {
+                                        FloatVectorOperations::copy(fdataRealOuts+(fServer.bufferSize*i),
+                                                                    fdataCopyOuts,
+                                                                    fServer.bufferSize);
+                                    }
+                                }
                             }
                         }
                     }

source/libjack/libjack_latency.cpp

@@ -44,7 +44,12 @@ void jack_port_get_latency_range(jack_port_t*, jack_latency_callback_mode_t, jac
 
 // --------------------------------------------------------------------------------------------------------------------
 
-//int jack_recompute_total_latencies (jack_client_t *client) JACK_OPTIONAL_WEAK_EXPORT;
+CARLA_EXPORT
+int jack_recompute_total_latencies(jack_client_t* client)
+{
+    carla_stderr2("%s(%p)", __FUNCTION__, client);
+    return 0;
+}
 
 CARLA_EXPORT
 jack_nframes_t jack_port_get_latency(jack_port_t* port)